Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Euhius (cf. Lach. ad Lucr. 5, 743; also, Euius; less correctly, as in some edd., Evius), ii, m., a surname of Bacchus, Lucr. 5, 742; Cic. Fl. 25, 60; Hor. C. 1, 18, 9; 2, 11, 17; Col. poët. 10, 424.
Acc. Euhion, Pers. 1, 102; Ov. A. A. 1, 563; voc. Euhie, Stat. Th. 2, 72; Col. poët. 10, 224.
Hence,
Ēvĭus, v. Euhius.